1. Installation of ventilation ducts for oil fume extraction

安装抽油烟机的通风管道，在进行设计的时候，要以国家的标准为准，并一定要有生产厂家的合格证书以及检验证书，通常通风管尺寸在2000*450左右，是比较大的通风管道了。

When designing the ventilation duct for installing a range hood, national standards should be followed, and the manufacturer's certificate of conformity and inspection certificate must be provided. Usually, the size of the ventilation duct is around 2000 * 450, making it a relatively large ventilation duct.

2、浴霸通风管道安装

2. Installation of Yuba ventilation pipeline

安装浴霸通风管道规格尺寸需要300*300mm，或者300*600，其直径大概是在100到150之间，这个通风管道尺寸还是要根据家里的面积来选购一款大小合适的通风管道。通风管道的规格在40厘米以下的，其吊架的距离不得大于4米，如果通风管道规格是在40厘米以上的，其吊架的距离不得大于3米。

The installation of Yuba ventilation duct requires a size of 300 * 300mm or 300 * 600, with a diameter of approximately 100 to 150. The size of this ventilation duct should still be selected based on the size of the home. If the size of the ventilation duct is below 40 centimeters, the distance between the hangers shall not exceed 4 meters. If the size of the ventilation duct is above 40 centimeters, the distance between the hangers shall not exceed 3 meters.

3、新风系统通风管安装

3. Installation of ventilation duct for fresh air system

新风系统主机、金属风管都应该做保温处理。应该在吊杆上安装减震器；新风输出口、排风输出口和主机之间的连接都应该采取安装消声器或用软连接来连接

The host and metal air ducts of the fresh air system should be insulated. Shock absorbers should be installed on the suspension rods; The connection between the fresh air outlet, exhaust outlet, and the host should be made by installing a muffler or using a soft connection

风管道风量计算

Calculation of air volume in air ducts

举例来说：如果风管截面积：0.2048平方米，管道里气流按20米/秒

For example, if the cross-sectional area of the air duct is 0.2048 square meters, the airflow in the duct is calculated at 20 meters per second

0.2048*20*3600=14745立方米/小时

0.2048 * 20 * 3600=14745 cubic meters/hour

这就是这个管道需要的流量，其它照此计算

This is the flow rate required for this pipeline, and other calculations are based on this

通风管道内风速及风量的测定，是通过测量压力换算得到。测得管道中气体的真实压力值，除了正确使用测压仪器外，合理选择测量断面、减少气流扰动对测量结果的影响很大。测量断面应尽量选择在气流平稳的直管段上。

The measurement of wind speed and air volume inside the ventilation duct is obtained by converting the measured pressure. To measure the true pressure value of gas in the pipeline, in addition to using pressure measuring instruments correctly, selecting a reasonable measurement section and reducing airflow disturbance have a significant impact on the measurement results. The measurement section should be selected as much as possible on a straight pipe section with smooth airflow.